package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartyFeignService;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * Copyright (c) 2019-2029 星大陆 All Rights Reserved
 * <p>
 * Project: gulimall
 * Package: com.atguigu.gulimall.auth.controller
 * Version: V 1.0
 * <p>
 * Created by guoxiaolong on 2021/01/13 16:32
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面。
     * SpringMVC viewcontroller； 将请求和页面映射过来。
     */
    @ResponseBody
    @PostMapping("/yzx/verifySms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        //TODO //1、接口防刷。
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 6000) {
                //60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2、验证码的再次校验。redis。存 key-phone, value-code  sms:code:18240885452 -> 45678
        String variable = UUID.randomUUID().toString().substring(0, 5);
        String substring = variable + "_" + System.currentTimeMillis();

        //long var3, TimeUnit var5
        //redis 缓存验证码，防止同一 phone 在 60 秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, substring, 10, TimeUnit.MINUTES);

        thirdPartyFeignService.sendSMSCode(phone, variable);
        return R.ok();
    }

    /**
     * //TODO 重定向携带数据,利用session原理，将数据放在session中，
     * 只要跳到下一个页面取出数据后，session里的数据就会删掉
     * <p>
     * <p>
     * // TODO  1、分布式下的session问题
     * RedirectAttributes   模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

            redirectAttributes.addFlashAttribute("errors", errors);
            //Request method 'POST' not supported
            //用户注册 -> /regist[post] ---》转发/reg.html (路径映射默认都是 get 方式访问的。）

            //校验出错,转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //1.校验验证码
        String code = vo.getCode();
        String phone = vo.getPhone();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
                //验证码通过。 //真正注册。调用远程服务注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>() {
                    }));
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            //校检出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session) {

        //远程登录
        R r = memberFeignService.login(vo);
        if (r.getCode() == 0) {
            MemberResponseVo data = r.getData(new TypeReference<MemberResponseVo>() {
            });
            //成功放到 session 中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", r.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            //没登陆
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }
    }
}
